Actually, I think you might be confusing MBAE (Malwarebytes Anti-Exploit) and MBARW-BETA (Malwarebytes Anti-Ransomware BETA)??
AFAIK, there are no current plans to integrate MBAE into MBAM.
It is a different product that works differently.
MBAE requires separate purchase and separate Premium licensing.
MBAM -- like your AV -- protects against the "what" of malware. The Free version is only a manual scanner, while the Premium version provides real-time anti-malware protection alongside your AV.
MBAE protects against the "how" of malware. MBAE Free provides real-time protection for browsers and plug-ins, while MBAE Premium can be customized to shield any internet-facing application.
Occasional promotions at the Malwarebytes online store offer discounts when purchasing MBAM and MBAE at the same transaction. But they remain separate and AFAIK will remain so.
MBARW-BETA, on the other hand, may indeed be merged into MBAM at some point when the development team determines it is appropriate to do so. It is still a BETA product. It differs from both MBAM and MBAE, as it is a specialized anti-ransomware tool.
I hope this helps,
"Lifetime" licenses simply are not commercially viable, for R&D, hiring/retaining quality staff, providing support, etc.
Writing and supporting good software costs money. It's as simple as that.
Malwarebytes corporation long ago (2014) clearly stated that all valid lifetime licenses would be grandfathered when they move to subscription licensing. They continue to honor that promise -- "once a lifetime license, always a lifetime license".
If you have a lifetime license for MBAM Premium, you do not need to buy a subscription.
Also, there is a discount for multiple subscriptions purchased at the same transaction, as well as a 2-year subscription option for both MBAM and MBAE at the Malwarebytes online store.
These work out to pennies per day per computer, or less.
And now, back on-topic....
MM (entirely unaffiliated with Malwarebytes corporation)
MBAM support forum.